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Cheap flights from Seattle to Denver from £96

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 29/10. Fares are subject to change and may not be available on all flights or dates of travel.
SEA — DEN
11 Aug — 18 Aug1
1 adult
1 adult, Economy, 0 bags

Cheap flight deals from Seattle to Denver

Enter your travel dates to find the best prices.

Cheapest flights from Seattle to Denver
Explore the most affordable flight options available from Seattle to Denver. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 12 July 2026.

Sat 5/909:20
SEA
-
DEN
2 stops9h 15m
Southwest
Mon 7/906:20
DEN
-
SEA
1 stop8h 05m
Southwest
Deal found 9/7£145
Fri 7/815:25
SEA
-
DEN
2 stops7h 20m
Southwest
Mon 10/819:05
DEN
-
SEA
1 stop6h 35m
Southwest
Deal found 10/7£148
Thu 3/918:15
SEA
-
DEN
Nonstop2h 45m
Southwest
Mon 7/920:55
DEN
-
SEA
Nonstop3h 00m
Southwest
Deal found 8/7£149
Thu 13/815:25
SEA
-
DEN
2 stops7h 20m
Southwest
Sat 22/813:35
DEN
-
SEA
2 stops7h 55m
Southwest
Deal found 8/7£150
Fri 7/815:25
SEA
-
DEN
2 stops7h 20m
Southwest
Tue 11/814:40
DEN
-
SEA
2 stops7h 35m
Southwest
Deal found 10/7£152
Mon 10/820:11
SEA
-
DEN
Nonstop2h 48m
Alaska Airlines
Sat 29/808:08
DEN
-
SEA
1 stop6h 37m
Alaska Airlines
Deal found 8/7£153
Wed 5/818:10
SEA
-
DEN
Nonstop2h 45m
Southwest
Wed 12/813:30
DEN
-
SEA
1 stop8h 30m
Southwest
Deal found 7/7£154
Wed 5/818:10
SEA
-
DEN
Nonstop2h 45m
Southwest
Sat 8/813:35
DEN
-
SEA
2 stops7h 55m
Southwest
Deal found 9/7£157
Thu 20/815:25
SEA
-
DEN
2 stops7h 20m
Southwest
Mon 24/819:00
DEN
-
SEA
1 stop6h 20m
Southwest
Deal found 8/7£157
Wed 12/820:11
SEA
-
DEN
Nonstop2h 48m
Alaska Airlines
Thu 27/813:43
DEN
-
SEA
1 stop7h 09m
Alaska Airlines
Deal found 8/7£159

Find flight deals from Seattle to Denver

Discover tips and strategies to find the most affordable flight options for your journey from Seattle (SEA) to Denver (DEN). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated 12 July 2026.

Round-trip from

£145

One-way from

£96

Popular in

June

Cheapest in

January

Average price

£199

Good one-way deal

£120 or less
Southwest
  • Southwest
  • 5/9-7/9
  • 3 total stops
  • 17h 20m total
  • Seattle to Denver
Search Deals
United Airlines
  • United Airlines
  • 21/11
  • 1 total stop
  • 7h 07m total
  • Seattle to Denver
Search Deals
Highest demand for flights based on searches. 21% potential increase in price (£34 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 4% potential price decrease (£6 potential savings vs. average return price).
Search Deals
Average for round-trip flights in July 2026
Search Deals
Price to beat on a one-way flight from Seattle/Tacoma Intl to Denver Intl.
Search Deals

Cheapflights Fare Finder

 
Customise your flight search to find flights from Seattle to Denver that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, Cheapflights users made 858,174 searches. Data last updated 12 July 2026.
Use the filters below to find and compare flights from Seattle to Denver that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest return flight

SeattleDenver

SEA - DEN

SEADEN

Seattle/Tacoma Intl

Fri 7/8

11:50-18:45

1 stop5h 55m

Denver Intl

Tue 11/8

14:40-21:15

2 stops7h 35m

£148

SeattleDenver

SEA - DEN

SEADEN

Seattle/Tacoma Intl

Thu 20/8

15:25-23:45

2 stops7h 20m

Denver Intl

Mon 24/8

19:00-00:20

1 stop6h 20m

£157

SeattleDenver

SEA - DEN

SEADEN

Seattle/Tacoma Intl

Thu 3/9

18:15-22:00

Nonstop2h 45m

Denver Intl

Sun 6/9

08:55-15:55

2 stops8h 00m

£176

SeattleDenver

SEA - DEN

SEADEN

Seattle/Tacoma Intl

Fri 28/8

07:00-16:45

2 stops8h 45m

Denver Intl

Mon 31/8

10:15-17:05

2 stops7h 50m

£181

SeattleDenver

SEA - DEN

SEADEN

Seattle/Tacoma Intl

Wed 25/11

19:40-23:28

Nonstop2h 48m

Denver Intl

Mon 30/11

06:45-08:59

Nonstop3h 14m

£196
Fastest return journey

SeattleDenver

SEA - DEN

SEADEN

Seattle/Tacoma Intl

Fri 20/11

18:51-22:32

Nonstop2h 41m

Denver Intl

Tue 24/11

20:55-23:02

Nonstop3h 07m

£196

SeattleDenver

SEA - DEN

SEADEN

Seattle/Tacoma Intl

Thu 24/9

07:00-16:45

2 stops8h 45m

Denver Intl

Mon 28/9

14:05-21:15

2 stops8h 10m

£200

SeattleDenver

SEA - DEN

SEADEN

Seattle/Tacoma Intl

Thu 3/12

19:40-23:28

Nonstop2h 48m

Denver Intl

Thu 10/12

12:20-14:31

Nonstop3h 11m

£207

SeattleDenver

SEA - DEN

SEADEN

Seattle/Tacoma Intl

Fri 14/8

18:15-22:00

Nonstop2h 45m

Denver Intl

Sun 16/8

07:35-14:00

2 stops7h 25m

£208

SeattleDenver

SEA - DEN

SEADEN

Seattle/Tacoma Intl

Fri 20/11

14:30-23:00

1 stop7h 30m

Denver Intl

Wed 25/11

12:20-14:31

Nonstop3h 11m

£214

Flights are sorted by cheapest return flights first.

Deals found on 7/7

Showing 1-10 of 22 resultsSorted by cheapest first
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Best time to book a flight from Seattle to Denver

Have a flexible travel schedule? Discover the best time to fly to Denver from Seattle with our price prediction graph.
Estimated return price
Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.

Cheapflights Insights

Everything you need to know about your flight from Seattle to Denver

How far ahead should I book a flight from Seattle to Denver?

The price you pay for your flight from Seattle to Denver may vary depending on when you book. For the best chance of a lower fare, look to book 73 days in advance of your trip. Fares are likely to increase a fortnight or so before your departure date.

What is the cheapest month to book a flight from Seattle to Denver?

Currently, January is the cheapest month in which you can book a flight from Seattle to Denver (average of £120). Flying from Seattle to Denver in June is currently the most expensive (average of £251). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

What is the cheapest time of day to fly from SEA to DEN?

Find hourly flight availability from Seattle to Denver. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated 12 July 2026.

One of the essential ways to save on airfare from Seattle to Denver is to remain as flexible as possible. Flights that are in the afternoon tend to be the most expensive. A flight in the morning could potentially save you up to 63% on airfare.

How much does it cost for a return flight from Seattle to Denver?

Related info for your journey

Find useful and relevant information for your journey from Seattle to Denver. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • How popular is this Seattle to Denver flight route?

    Flights from Seattle/Tacoma Intl to Denver Intl have been viewed 3 times in the past calendar month.

  • How long is the flight from Seattle to Denver?

    Departing from Seattle to Denver will take you 2h 48m. The distance between Seattle and Denver is about 1022 mi. This flight may include one or multiple stops.

  • What are the most reliable airlines from Seattle to Denver?

    No one likes to see their flight delayed. When booking a flight from Seattle to Denver consider choosing SWISS (95%), Japan Airlines (87%) or United Airlines (86%) as they are the most reliable in getting you off to your destination on time.

  • What are the cheapest flights from Seattle to Denver?

    Looking for the cheapest flight from Seattle to Denver? While on average our users pay £178, our data indicates the cheapest price to be £100. The most popular route (Seattle/Tacoma Intl - Denver Intl), is priced around £135.

  • Can I find deals for flights from Seattle to Denver that include hotel bookings?

    Yes. In addition to deals on Seattle to Denver flights, Cheapflights offers holiday packages that include both flights and hotel.

  • How can I find direct flights from Seattle to Denver?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Seattle to Denver.

  • Can I find deals for business class flights from Seattle to Denver?

    Yes. Cheapflights offers flight deals from Seattle to Denver by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

  • What is the cheapest month to book a flight from Seattle to Denver?

    Currently, January is the cheapest month in which you can book a flight from Seattle to Denver (average of £120). Flying from Seattle to Denver in June is currently the most expensive (average of £251). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

See more FAQs

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Why should you use Cheapflights to find cheap flight tickets from Seattle to Denver?

By finding flights from multiple airlines and providers at completely no cost, Cheapflights helps millions of users like you annually find the best flights to Denver from Seattle.

Can Cheapflights find flights from Seattle to Denver with no change fees?

Users can book flights with no change fees policies with our dedicated filters. Book flights from Seattle to Denver flexibly with Cheapflights today.

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Of course! You can now track prices for flights from Seattle to Denver and get an alert from Cheapflights when they change. Have a valid email address ready and click the bell icon next to the flight deals above to set up your price alerts.

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